North Korea established the Artificial Intelligence Research Institute in 2013, and in recent years, several companies have promoted commercial products featuring AI.
The students were sentenced, according to the video, after being convicted of watching and spreading South Korean movies, music and music videos over three months.
North Korea operates an illegal arms smuggling network used to finance its nuclear weapons program, across the world, according to US and UN investigators.
In a speech on Monday, Kim Jong Un said he had concluded that unification with the South was no longer possible and accused Seoul of seeking regime collapse and unification by absorption.
North and South Korea remain technically at war because the 1950-1953 Korean War ended in an armistice rather than a peace treaty.
Russia used North Korean missiles against Ukraine earlier this month, firing several at the city of Kharkiv on January 2.
Both Moscow and Pyongyang have drawn closer since the beginning of the Ukraine conflict, though they deny making any arms deals.
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